﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DropDownList1.Items.Add("Ngày");
        for (int i = 1; i <= 31; i++)
        {
            DropDownList1.Items.Add(i.ToString());
        }
        DropDownList2.Items.Add("Tháng");
        for (int i = 1; i <= 12; i++)
        {
            DropDownList2.Items.Add(i.ToString());
        }
        DropDownList3.Items.Add("Năm");
        for (int i = 1970; i <= 2013; i++)
        {
            DropDownList3.Items.Add(i.ToString());
        }
        
    }
}